NTPC CBT-2 Chemistry Quiz - 32

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Question 1:

Which of the following chemical is used for the preservation in milk?

Question 2:

The sulfide ore among the following is-

Question 3:

Which of the following gas is used in Cigarette lighters?

Question 4:

Iodised salt contains –

Question 5:

Why is wax emulsion used in fruits and vegetables?